Automobile turn signal lampshade injection mold

Abstract

The present invention belongs to the field of injection molds, and specifically discloses an injection mold for a car turn signal lampshade, wherein a first fixing seat is fixedly connected above the upper mold, a first heat-conducting gap is provided between the upper mold and the first fixing seat, a second fixing seat is fixedly connected below the lower mold, a second heat-conducting gap is provided between the lower mold and the second fixing seat, the longitudinal section of the movable seat is in the shape of a rectangular frame, the movable seat has an upper edge and a lower edge, the upper edge is located in the first heat-conducting gap, the lower edge is located in the second heat-conducting gap, a first heat-conducting pad is slidably connected between the bottom of the upper edge and the upper mold, a first heat-conducting pad is slidably connected between the top of the lower edge and the lower mold, an upper ejector rod is connected to the upper edge, a lower ejector rod is fixedly connected to the lower edge, the upper ejector rod is slidably connected in the upper mold, and the lower ejector rod is slidably connected in the lower mold. The device solves the problem that the lampshade will be attached to the upper mold, causing the lampshade to fall off when the mold is opened, thereby causing damage to the lampshade.

Description

Technical Field

[0001] The present invention belongs to the field of injection molds, and particularly relates to an injection mold for an automobile turn signal lamp cover. Background Art

[0002] Injection molded parts are usually processed by injection molds. The structure of the mold generally has two upper and lower modules. After the upper mold and the lower mold are hermetically combined, an injection cavity is formed in the middle. Since molten plastic pellets are added during injection, it is easy to deform structures such as the mold core and the mold. Therefore, it is necessary to accelerate cooling and make the injection molded part form faster after pouring. When the prior art mold is opened, usually a separate mold opening device is used to move the upper mold upward, and the mold is ejected by a lower ejector rod. When the mold is closed, usually a return spring is used to reset the lower ejector rod.

[0003] At present, the common mold cooling methods in the injection molding industry are mainly water cooling and oil cooling. Generally, water cooling is usually adopted in the injection molding industry, that is, water channels are arranged in or around the mold cavity, and the heat is taken away by the water cooling cycle to increase the cooling time, control the mold temperature, and shorten the molding cycle. However, the lower mold and the upper mold of the existing injection molds are cooled separately, and this cooling method has the problem of uneven cooling, resulting in quality problems of the product.

[0004] In the prior art, the cooling water channels in the upper mold and the lower mold are also connected to solve the problem of uneven cooling of the lower mold and the upper mold. However, after the water channels in the lower mold and the upper mold are connected, when the mold is opened, the coolant remaining in the upper mold will drip onto the lower mold, causing pollution to the lower mold, and thus causing pollution to the product in the cavity.

[0005] In addition, during the injection molding process of the automobile turn signal lamp cover, the upper mold and the lower mold cooperate with each other. When the mold is opened after the injection molded part is formed, the upper mold is first removed, and then the lower mold is removed to obtain the finished product. Since the lamp cover adheres to the upper mold and cannot completely adhere to the lower mold side due to thermal stress or adhesion of the mold release agent during the process of removing the upper mold, and part of it adheres to the upper mold. When the mold rises a certain distance, the lamp cover falls off, causing damage to the lamp cover. Summary of the Invention

[0006] The purpose of the present invention is to provide an injection mold for an automobile turn signal lamp cover to solve the problem that the lamp cover adheres to the upper mold, resulting in the lamp cover falling off during mold opening and causing damage to the lamp cover.

[0007] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides an injection mold for an automobile turn signal lamp cover, comprising a movable seat, a lower film and an upper mold that can cover the lower mold, a first fixed seat is fixedly connected above the upper mold, a first heat-conducting gap is provided between the upper mold and the first fixed seat, a second fixed seat is fixedly connected below the lower mold, a second heat-conducting gap is provided between the lower mold and the second fixed seat, the longitudinal cross-section of the movable seat is in the shape of a rectangular frame, the movable seat has an upper edge and a lower edge, the upper edge is located in the first heat-conducting gap, the lower edge is located in the second heat-conducting gap, a first heat-conducting pad is slidably connected between the bottom of the upper edge and the upper mold, a first heat-conducting pad is slidably connected between the top of the lower edge and the lower mold, an upper ejector rod for fixing a workpiece from above is connected to the upper edge, a lower ejector rod for ejecting the workpiece is fixedly connected to the lower edge, the upper ejector rod is slidably connected in the upper mold, and the lower ejector rod is slidably connected in the lower mold.

[0008] The principle of this basic solution is that after the lampshade is formed between the upper cavity and the lower cavity, the upper ejector rod and the lower ejector rod clamp the upper and lower surfaces of the lampshade from the upper and lower sides of the lampshade respectively. When the mold needs to be opened, the first thermal pad and the second thermal pad are moved out from the first thermal gap and the second thermal gap respectively. In the process of moving the upper mold upward, the movable seat remains stationary under the action of its own weight, so that the upper ejector rod remains stationary. That is, the upper ejector rod moves downward relative to the upper mold in the first thermal gap, and pushes the lampshade out of the upper mold to prevent the lampshade from sticking to the upper mold and moving with the upper mold. The upper mold continues to move, and the upper mold drives the movable seat to move upward. During the upward movement of the movable seat, the lower ejector rod is driven upward, and the lampshade is ejected from the lower mold. At this point, the lampshade is ejected.

[0009] The beneficial effects of this basic solution are: 1. This device pushes the lampshade out of the upper mold by moving the upper ejector rod relative to the upper mold, preventing the lampshade from being attached to the upper mold and falling off after the upper mold moves up a distance, causing damage to the lampshade.

[0010] 2. The device simultaneously connects the upper ejector rod and the lower ejector rod through the moving seat, and the upper ejector rod and the lower ejector rod are reset by the deadweight of the moving seat, thus saving the spring used as the reset component in the prior art.

[0011] 3. In the device, the movement of the upper mold drives the moving seat to move, thereby saving the power mechanism used separately for pushing the upper ejector rod and the lower ejector rod in the prior art.

[0012] Optimization plan 1: A cooling water channel is provided in the movable seat. The movable seat in the present device is provided with a cooling water channel to cooperate with the movable seat as an integrated cooling system. First, the dead weight of the coolant in the cooling water channel is utilized to increase the power of resetting the movable seat. Second, a circulating coolant flow channel is formed by utilizing the movable seat so that the upper mold and the lower mold are cooled by the same cooling system, so that the upper and lower surfaces of the lampshade are cooled evenly. Third, the cooling system is always in an integrated state when the mold is opened, which is different from the prior art in that the upper and lower cooling systems need to be separated when the mold is opened, thus avoiding the coolant in the upper cooling system from dripping to the lower mold when the mold is opened, causing contamination. At the same time, the integrated cooling system does not need to extract the coolant when opening the mold and then open the mold, and then inject it into the cooling system when closing the mold, thereby improving production efficiency.

[0013] Optimization solution 2: The upper push rod is threadedly connected to the upper edge. The upper push rod is threadedly connected to the edge, and the upper push rod is rotated so that the upper push rod no longer presses against the upper surface of the lampshade, so that the lampshade is easy to take out.

[0014] Optimization solution three: The first heat conducting block and the second heat conducting block are both made of copper. The heat conducting block made of copper has high thermal conductivity, which facilitates the rapid molding of the lampshade and improves production efficiency.

[0015] Optimization scheme 4: The upper die is provided with a clamping opening, which is convenient for clamping the upper die and lifting the upper die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic structural diagram of an injection mold for a lampshade of an automobile turn signal lamp according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below through specific embodiments:

[0018] The reference numerals in the drawings of the specification include: a movable seat 1, an upper mold 2, a first fixed seat 3, an upper ejector rod 4, a lampshade 5, a cooling water channel 6, a first heat conduction gap 7, a lower mold 8, a second heat conduction gap 9, and a second fixed seat 10.

[0019] Embodiment: The automobile turn signal lampshade injection mold in this solution is as follows: Figure 1As shown, it includes a liquid inlet pump, a liquid discharge pump, a movable seat 1, a lower film and an upper die 2 that can cover the lower die 8, and a clamping port is provided on the upper die 2. The upper die 2 has a first cavity, the lower die 8 has a second cavity, a first fixed seat 3 is integrally formed above the upper die 2, a first heat conduction gap 7 is provided between the upper die 2 and the first fixed seat 3, a second fixed seat 10 is integrally formed below the lower die 8, and a second heat conduction gap 9 is provided between the lower die 8 and the second fixed seat 10. The longitudinal section of the movable seat 1 is in the shape of a rectangular frame, and the movable seat 1 has an upper edge and a lower edge, the upper edge is located in the first heat conduction gap 7, and the lower edge is located in the second heat conduction gap 9. A first heat conduction pad is slidably connected between the bottom of the upper edge and the upper die 2, and a first heat conduction pad (not shown in the figure) is slidably connected between the top of the lower edge and the lower die 8. The first heat conduction block and the second heat conduction block are both made of copper, and the first heat conduction block and the second heat conduction block are provided with retreat holes for passing the upper ejector rod 4 and the lower ejector rod. An upper ejector rod 4 for fixing the workpiece from above is connected to the upper edge, and a threaded hole is provided on the upper edge. The upper ejector rod 4 is threadedly connected in the threaded hole, and a fixing nut is threadedly connected to the top of the upper ejector rod 4. A lower ejector rod for ejecting the workpiece is welded on the lower edge. The upper ejector rod 4 is slidably connected in the upper mold 2, and the lower ejector rod is slidably connected in the lower mold 8. A cooling water channel 6 is provided in the movable seat 1, and one end of the cooling water channel 6 is connected to the output end of the liquid inlet pump through a hose, and the other end of the cooling water channel 6 is connected to the input end of the liquid discharge pump through a hose, and the cooling water channel 6 is evenly distributed in the movable seat 1. The input end of the liquid inlet pump is connected to the coolant storage tank, and the output end of the liquid discharge pump is connected to the coolant storage tank, and a cooling device (cooling water circulation device CA-1310) is installed on the coolant storage tank.

[0020] After the molten plastic is injected into the mold, the molten plastic in the mold cavity needs to be cooled before molding. A liquid inlet pump is used to inject coolant into the cooling water channel 6 in the movable seat 1, and the coolant enters the upper and lower edges to cool the upper mold 2 and the lower mold 8.

[0021] After the lampshade 5 is formed between the upper cavity and the lower cavity, the upper ejector rod 4 and the lower ejector rod clamp the upper surface and the lower surface of the lampshade 5 from the upper and lower sides of the lampshade 5, respectively. When the mold needs to be opened, the first heat-conducting pad and the second heat-conducting pad are respectively moved out of the first heat-conducting gap 7 and the second heat-conducting gap 9. In the process of moving the upper mold 2 upward, the movable seat 1 remains stationary under the action of its own weight, so that the upper ejector rod 4 remains stationary. That is, the upper ejector rod 4 moves downward relative to the upper mold 2 in the first heat-conducting gap 7, and the lampshade 5 is ejected from the upper mold 2 to prevent the lampshade 5 from being attached to the upper mold 2 and moving with the upper mold 2. The upper mold 2 continues to move, and the upper mold 2 drives the movable seat 1 to move upward. During the process of the movable seat 1 moving upward, the lower ejector rod is driven upward, and then the lampshade 5 is ejected from the lower mold 8. At this time, the upper ejector rod 4 is rotated to use the threaded pair to move the upper ejector rod 4 relative to the upper edge, so that the upper ejector rod 4 no longer presses against the upper surface of the lampshade 5. At this point, the ejection of the lampshade 5 is completed.

[0022] After the lampshade 5 is taken out, when the mold needs to be closed, the upper mold 2 is lowered to cover the upper mold 2 and the lower mold 8. At this time, the movable seat 1 moves downward under the gravity of its own weight and the coolant in the cooling water channel 6. As a result, the upper ejector rod 4 is retracted into the upper mold 2, and the lower ejector rod is retracted into the lower mold 8. The first heat conductive pad block and the second heat conductive pad block are respectively inserted into the first heat conductive gap 7 and the second heat conductive gap 9, and the mold closing action is completed.

[0023] The above is only an embodiment of the present invention, and the common knowledge in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Automobile turn signal lampshade injection mold, Features: It comprises a movable seat, a lower film and an upper die that can cover the lower die, a first fixed seat is fixedly connected above the upper die, a first heat-conducting gap is provided between the upper die and the first fixed seat, a second fixed seat is fixedly connected below the lower die, a second heat-conducting gap is provided between the lower die and the second fixed seat, the longitudinal section of the movable seat is in the shape of a rectangular frame, the movable seat has an upper edge and a lower edge, the upper edge is located in the first heat-conducting gap, the lower edge is located in the second heat-conducting gap, a first heat-conducting pad is slidably connected between the bottom of the upper edge and the upper die, a first heat-conducting pad is slidably connected between the top of the lower edge and the lower die, an upper ejector rod for fixing a workpiece from above is connected to the upper edge, a lower ejector rod for ejecting a workpiece is fixedly connected to the lower edge, the upper ejector rod is slidably connected in the upper die, and the lower ejector rod is slidably connected in the lower die; The movable seat is provided with a cooling water channel, and also includes an inlet pump and a discharge pump. One end of the cooling water channel is connected to the output end of the inlet pump through a hose, and the other end of the cooling water channel is connected to the input end of the discharge pump through a hose. The cooling water channels are evenly distributed in the movable seat.

2. The automobile turn signal lampshade injection mold according to claim 1, Features: The upper push rod is threadedly connected to the upper edge.

3. The automobile turn signal lampshade injection mold according to claim 2, Features: The first heat-conducting block and the second heat-conducting block are both made of copper.

4. The automobile turn signal lampshade injection mold according to claim 3, Features: The upper die is provided with a clamping opening.

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